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Sat Feb 18 00:07:48 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-February/061299.html

Adam Olsen wrote:
> You could pass a float in as well.  But if the function is documented
> as taking a dict, and the programmer expects a dict.. that now has to
> be changed to "dict without a default".  Or they have to code
> defensively since d[key] may or may not raise KeyError, so they must
> avoid depending on it either way.

Can you give an example of real, existing code that will break
if a such a dict is passed?

Regards,
Martin

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[Python-Dev] Proposal: defaultdict